Nikon 50mm f/1.8g not as sharp as Nikon 85mm f/1.8g

Nonsense.    All these prime lenses are sharp and contrasty.    Some of the less expensive lenses need to be stopped down a bit to obtain maximum sharpness, but they are all sharp is used right.   Heck, I have a $70 Sigma 28-200 zoom lens that got awful reviews but is plenty sharp if used properly.    And I blow up my images on a high quality 27" monitor.     Look, these manufacturers don't produce unsharp lenses.    Learn how to use each lens properly and you will be much happier.    It's not the lens, pal.